Device for removing volatile organic compounds in oil gas

Abstract

The utility model discloses an oil gas volatile organic compound removal device which comprises a shell, a primary filtering assembly and a secondary filtering assembly, a containing cavity is formed in the shell, the top and the bottom of the shell are provided with a gas outlet and a gas inlet respectively, and the gas outlet and the gas inlet are communicated with the containing cavity. The first-stage filtering assembly and the second-stage filtering assembly are sequentially arranged in the accommodating cavity from low to high. Gas needing to be treated can pass through the first-stage filtering assembly and the second-stage filtering assembly in the device, volatile organic compounds in oil gas can be removed, the occupied space is small, the maintenance cost is low, the purification efficiency is high, and the volatile organic compounds are prevented from harming the environment.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, and more specifically, to a device for removing volatile organic compounds in oil and gas. Background Art

[0002] The main components of petroleum are a mixture of various alkanes, cycloalkanes, and aromatic hydrocarbons. It is mainly used as fuel and gasoline, and is also the raw material for many chemical industrial products, such as solutions, fertilizers, pesticides, and plastics. During the petroleum production process, volatile organic compounds (VOCs) are produced. The production of VOCs mainly comes from two stages: the development and construction period and the oil and gas production period. During the development and construction period, the main sources of pollution are emissions from drilling, diesel engine combustion, and blowout accidents. During the oil and gas production period, the main sources of pollution are organized emissions.

[0003] Volatile organic compounds in oil and gas can harm the environment, affect air quality, and may also cause environmental problems such as haze and acid rain. Long-term exposure can pose a threat to human health and cause respiratory diseases, immune system diseases, nervous system diseases and other health problems, and they need to be dealt with urgently.

[0004] Prior art CN217829498U discloses a petrochemical waste gas treatment device, comprising a housing, support legs, an air inlet pipe, an air outlet pipe, and an exhaust fan. A spray assembly is provided on the housing near the air inlet pipe, and a filter assembly is provided at the bottom of the housing. The filter assembly includes an outlet pipe extending through and fixed to the bottom of the housing, and a storage box provided at the bottom of the housing. The top of the storage box is provided with a socket for inserting the lower end of the outlet pipe. The filter assembly also includes a filter screen provided in the socket, the upper surface of the filter screen abutting the lower end of the outlet pipe. When treating petrochemical waste gas, the spray assembly sprays the petrochemical waste gas entering the housing through the air inlet pipe, dissolving water-soluble organic matter in the petrochemical waste gas in water and reducing the content of toxic components in the petrochemical waste gas. However, the structure of the device is complex and occupies a large area. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a device for removing volatile organic compounds from oil and gas, which can perform two-stage filtration on petroleum waste gas, has good purification effect, simple structure and small space occupation.

[0006] To achieve the above-mentioned purpose, the present technical solution provides an oil and gas volatile organic compound removal device, comprising an outer shell, a primary filter assembly, and a secondary filter assembly. A accommodating cavity is formed in the outer shell, and the top and bottom of the outer shell are respectively provided with an air outlet and an air inlet connected to the accommodating cavity. The primary filter assembly and the secondary filter assembly are arranged in the accommodating cavity in sequence from low to high.

[0007] In this technical solution, the external equipment is connected to the air inlet through a pipe to transport the petroleum waste gas to the bottom of the accommodating chamber. The waste gas first passes through the primary filter component to filter out most of the volatile organic compounds, and then passes through the secondary filter component to further filter the volatile organic compounds in the waste gas after the primary filtration. Finally, it is discharged through the air outlet on the top. This device cleverly uses the spatial structure to allow the waste gas to undergo secondary filtration from low to high independently. While ensuring the filtering effect, the space occupied is greatly reduced, and the harmful components of the filtered waste gas are greatly reduced.

[0008] As a preferred solution, the first-level filter assembly includes a first filter support frame and a plurality of first filter materials detachably connected to the top of the first filter support frame. The outer peripheral edge of the first filter support frame is connected to the inner wall of the outer shell. The first filter material is detachably connected, which facilitates the staff to regularly replace the first filter material to ensure the filtering effect.

[0009] As a preferred solution, in order to ensure that all exhaust gases are filtered through the first filter material, the first filter support frame is provided with a plurality of first filter holes for installing the first filter materials, and one end of each first filter material is vertically installed on the top of each first filter hole. The exhaust gases enter the first filter material through the first filter holes from the bottom of the first filter support frame for filtration.

[0010] As a preferred solution, the first filter material is a cylindrical dense wire mesh filter element, a cavity is provided inside the first filter material, an opening connected to the cavity is provided at the bottom of the first filter material, and the opening is screwed to the first filter hole. The cylindrical dense wire mesh filter element is hydrophilic and lipophilic, and the exhaust gas can filter out oil, water and organic compound particles when passing through the cylindrical dense wire mesh filter element.

[0011] As a preferred solution, the secondary filter assembly includes a second filter support frame and a second filter material. A boss is provided on the inner wall of the outer shell near the top of the first-level filter assembly. The second filter support frame is installed on the boss. The end face of the second filter support frame is evenly provided with a plurality of second filter holes. The second filter material is activated carbon. The second filter material is laid on the end face of the second filter support frame. The exhaust gas that has passed the first-level filtration contacts the second filter material through the second filter holes. The second filter material can adsorb harmful substances in the exhaust gas. At the same time, the setting of the boss can facilitate the installation and disassembly of the second filter support frame and facilitate the replacement of the second filter material.

[0012] As a preferred solution, the second filter support frame is basin-shaped, and a cover plate is clamped on the top of the second filter support frame. The third filter hole is provided on the end face of the cover plate. A handle is connected to the cover plate. The cover plate can effectively prevent the second filter material from scattering when it is replaced. When in use, the new second filter material is first evenly laid on the second filter support frame, the cover plate is installed, the assembly of the secondary filter assembly is completed, and then it is installed on the boss by the handle.

[0013] As a preferred solution, an opening is provided on the top of the shell, and a cavity cover is detachably connected to the opening, and the air outlet is provided on the cavity cover. After a period of use, the first filter material and the second filter material are consumables, and their filtering effects inevitably decline. It is necessary to regularly replace the first filter material and the second filter material and clean the accommodating cavity. During maintenance of the device, the cavity cover is first opened, and the secondary filter device is taken out by the handle, the cover is opened to replace the second filter material, and then the first filter material is screwed to replace, and finally the device is flushed, and the maintenance cost is low.

[0014] As a preferred solution, a first valve is provided on the air inlet, which can prevent the exhaust gas generated by the equipment from continuing to be discharged after closing, so that personnel can maintain the device and can also prevent the exhaust gas from flowing back.

[0015] As a preferred solution, a sewage storage layer is provided at the bottom of the accommodating cavity, and the sewage storage layer is provided at the bottom of the primary filter component. The air inlet is provided on the side wall of the outer shell and corresponds to the position of the sewage storage layer. The bottom of the outer shell is provided with a sewage outlet corresponding to the position of the sewage storage layer. A second valve is provided on the sewage outlet. The sewage storage layer can store volatile organic compounds filtered out by the primary filter component and the secondary filter component to avoid secondary pollution. After opening the second valve, the volatile organic compounds can be discharged from the sewage outlet for the next step of harmless treatment.

[0016] As a preferred solution, a liquid level gauge corresponding to the position of the sewage storage layer is provided on the side wall of the housing. The content of pollutants in the sewage storage layer is observed through the liquid level gauge to provide a reference for the maintenance time of the device.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The utility model can remove volatile organic compounds in oil and gas through the primary filter component and the secondary filter component, with high purification efficiency.

[0019] 2. The utility model cleverly utilizes the spatial structure. The primary filter component and the secondary filter component are arranged in sequence from low to high. The exhaust gas can filter out volatile organic compounds by passing through the primary filter component and the secondary filter component independently. It has a simple structure, small footprint and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0022] Figure 3 It is a structural diagram of the first-level filtration component;

[0023] Figure 4 is a schematic structural diagram of a first filter support frame;

[0024] Figure 5 is a schematic structural diagram of the first filter material;

[0025] Figure 6 It is a schematic diagram of the structure of the secondary filtration component;

[0026] Figure 7 Schematic diagram of the structure of the second filter support frame.

[0027] In the figure: outer shell 1; accommodating chamber 11; air inlet 12; first valve 121; air outlet 13; sewage outlet 14; second valve 141; sewage storage layer 15; chamber cover 16; supporting foot 17; boss 18; liquid level gauge 19; primary filter assembly 2; first filter support frame 21; first filter hole 211; first filter material 22; secondary filter assembly 3; second filter support frame 31; second filter hole 311; second filter material 32; cover plate 33; third filter hole 331; handle 332. DETAILED DESCRIPTION

[0028] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0031] Example 1:

[0032] like Figures 1 to 7 As shown, this embodiment provides an oil and gas volatile organic compound removal device, including a shell 1, a primary filter component 2 and a secondary filter component 3. A accommodating cavity 11 is formed in the shell 1, and the top and bottom of the shell 1 are respectively provided with an air outlet 13 and an air inlet 12 connected to the accommodating cavity 11. The primary filter component 2 and the secondary filter component 3 are arranged in the accommodating cavity 11 from low to high.

[0033] In this embodiment, the shell 1 is cylindrical, and an opening is provided at the top of the shell 1. A cavity cover 16 is detachably connected to the opening. The air outlet 13 is provided on the cavity cover 16. A plurality of snap-fit ​​positions are provided on the outer periphery of the cavity cover 16. A plurality of snaps are provided on the opening. The cavity cover 16 is snapped onto the opening through a plurality of snaps. At the same time, a sealing ring is provided between the cavity cover 16 and the opening to ensure sealing and ensure that the treated exhaust gas is only released from the air outlet 13. A gas detector is provided at the air outlet 13, which is used to detect whether the exhaust gas emissions meet environmental protection standards and provide a reference for the replacement date of the first filter material 22 and the second filter material 32. A first valve 121 is provided on the air inlet 12, and the first valve 121 can be a ball valve.

[0034] Specifically, the primary filter assembly 2 includes a first filter support frame 21 and a plurality of first filter materials 22 detachably connected to the top of the first filter support frame 21 . The outer peripheral edge of the first filter support frame 21 is connected to the inner wall of the housing 1 .

[0035] In this embodiment, the exhaust gas cannot directly pass through the first filter support frame 21. The exhaust gas first enters the first filter material 22, is filtered by the first filter material 22, and then is discharged upward. The outer periphery of the first filter support frame 21 is tightly connected to the inner wall of the outer shell 1 to prevent the exhaust gas from leaking from the connection between the outer shell 1 and the first filter support frame 21.

[0036] Specifically, the first filter support frame 21 is provided with a plurality of first filter holes 211 for installing the first filter material 22, and one end of each first filter material 22 is vertically installed on the top of each first filter hole 211. The first filter material 22 is a cylindrical dense wire mesh filter element, and a cavity is provided inside the first filter material 22. An opening 221 communicating with the cavity is provided at the bottom of the first filter material 22, and the opening 221 is screwed to the first filter hole 211.

[0037] In this embodiment, the first filter hole 211 is provided with an internal thread, and one end of the first filter material 22 is provided with an external thread. The first filter material 22 is threadedly connected to the first filter hole 211. The first filter material 22 is made of stainless steel and has an opening 221 only at one end. The exhaust gas accumulates continuously at the bottom of the accommodating cavity 11 and then enters the cavity of the first filter material 22 through the opening 221. As the exhaust gas pressure increases, the exhaust gas gradually seeps out through the wall of the first filter material 22. The exhaust gas is filtered during the seepage process, and the cylindrical dense wire mesh filter element can filter out volatile organic compounds.

[0038] Specifically, the secondary filter assembly 3 includes a second filter support frame 31 and a second filter material 32. A boss 18 is provided on the inner wall of the outer shell 1 near the top of the first-level filter assembly 2. The second filter support frame 31 is installed on the boss 18. The end face of the second filter support frame 31 is evenly provided with a plurality of second filter holes 311. The second filter material 32 is activated carbon. The second filter material 32 is laid on the end face of the second filter support frame 31. The second filter support frame 31 is basin-shaped. A cover plate 33 is clamped on the top of the second filter support frame 31. The end face of the cover plate 33 is provided with the third filter hole 331, and a handle 332 is connected to the cover plate 33.

[0039] In this embodiment, the second filter support frame 31 is used to hold the second filter material 32 to prevent the second filter material 32 from leaking. The second filter material 32 is activated carbon particles, and the diameter of the activated carbon particles is larger than the diameter of the third filter hole 331. There are countless tiny pores on its surface. The diameter of the micropores on the surface of the activated carbon is mostly between 2 and 50 nm. The activated carbon has a strong adsorption effect on gas and can strongly adsorb harmful gases in the air. In addition, the activated carbon is physically adsorbed, has no side effects, will not produce secondary pollution, and is harmless to the human body.

[0040] Example 2:

[0041] This embodiment is similar to embodiment 1, except that, in this embodiment, Figure 1 As shown, a sewage storage layer 15 is provided at the bottom of the accommodating chamber 11, and the sewage storage layer 15 is provided at the bottom of the first-stage filter assembly 2. The air inlet 12 is provided on the side wall of the outer shell 1 and corresponds to the position of the sewage storage layer 15. A sewage outlet 14 corresponding to the position of the sewage storage layer 15 is provided at the bottom of the outer shell 1, and a second valve 141 is provided on the sewage outlet 14. A supporting foot 17 is provided at the bottom of the outer shell 1.

[0042] In this embodiment, the three supporting legs 17 are welded to the bottom of the shell 1 to elevate the shell 1, and the sewage outlet 14 is arranged at the center of the bottom of the shell 1 to facilitate personnel to discharge pollutants in the sewage storage layer 15 in time to maintain the device.

[0043] Specifically, a liquid level gauge 19 corresponding to the position of the sewage storage layer 15 is provided on the side wall of the housing 1 .

[0044] In this embodiment, the liquid level meter 19 introduces a portion of pollutants into the liquid level meter 19 using the principle of a communicating vessel. The liquid level height indicated by the liquid level meter 19 is the liquid level height of the pollutant storage layer 15 .

[0045] Example 3:

[0046] This embodiment is similar to embodiment 1, except that, in this embodiment, an air extraction device is provided at the air outlet 13 to increase the filtration rate of the exhaust gas.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0048] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A device for removing volatile organic compounds from oil and gas, characterized in that: The invention comprises a housing (1), a primary filter assembly (2) and a secondary filter assembly (3); a housing (11) is formed in the housing (1); an air outlet (13) and an air inlet (12) communicating with the housing (11) are respectively provided at the top and bottom of the housing (1); the primary filter assembly (2) and the secondary filter assembly (3) are arranged in the housing (11) in sequence from the lowest to the highest.

2. The device for removing volatile organic compounds from oil and gas according to claim 1, characterized in that: The primary filter assembly (2) comprises a first filter support frame (21) and a plurality of first filter materials (22) detachably connected to the top of the first filter support frame (21); the outer peripheral edge of the first filter support frame (21) is connected to the inner wall of the housing (1).

3. The device for removing volatile organic compounds from oil and gas according to claim 2, characterized in that: The first filter support frame (21) is provided with a plurality of first filter holes (211) for installing the first filter material (22), and one end of each first filter material (22) is vertically installed on the top of each first filter hole (211).

4. The device for removing volatile organic compounds from oil and gas according to claim 3, characterized in that: The first filter material (22) is a cylindrical dense wire mesh filter element. A cavity is provided inside the first filter material (22). An opening (221) communicating with the cavity is provided at the bottom of the first filter material (22). The opening (221) is screwed to the first filter hole (211).

5. The device for removing volatile organic compounds from oil and gas according to claim 1, characterized in that: The secondary filter assembly (3) comprises a second filter support frame (31) and a second filter material (32); a boss (18) is provided on the inner wall of the housing (1) near the top of the primary filter assembly (2); the second filter support frame (31) is mounted on the boss (18); a plurality of second filter holes (311) are evenly provided on the end surface of the second filter support frame (31); the second filter material (32) is activated carbon; and the second filter material (32) is laid on the end surface of the second filter support frame (31).

6. The device for removing volatile organic compounds from oil and gas according to claim 5, characterized in that: The second filter support frame (31) is basin-shaped, and a cover plate (33) is clamped on the top of the second filter support frame (31). A third filter hole (331) is provided on the end surface of the cover plate (33), and a handle (332) is connected to the cover plate (33).

7. The device for removing volatile organic compounds from oil and gas according to claim 1, characterized in that: The top of the housing (1) is provided with an opening, the opening is detachably connected to a cavity cover (16), and the air outlet (13) is provided on the cavity cover (16).

8. The device for removing volatile organic compounds from oil and gas according to claim 1, characterized in that: The air inlet (12) is provided with a first valve (121).

9. The device for removing volatile organic compounds from oil and gas according to claim 1, characterized in that: A sewage storage layer (15) is provided at the bottom of the accommodating chamber (11), and the sewage storage layer (15) is provided at the bottom of the primary filter assembly (2). The air inlet (12) is provided on the side wall of the housing (1) and corresponds to the position of the sewage storage layer (15). A sewage outlet (14) corresponding to the position of the sewage storage layer (15) is provided at the bottom of the housing (1), and a second valve (141) is provided on the sewage outlet (14).

10. The device for removing volatile organic compounds from oil and gas according to claim 9, characterized in that: A liquid level gauge (19) corresponding to the position of the sewage storage layer (15) is provided on the side wall of the housing (1).

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